JP3228717B2 - Laser marker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser marker device which moves a laser beam irradiation point using a galvanomirror device and marks desired characters and figures on a work according to the trajectory thereof.

[0002]

2. Description of the Related Art A laser marker device of this type is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. Hei 7-33476, and the position of an irradiation point is moved by changing the direction of a laser beam emitted from a laser light source. It is marked on. In order to change the direction of the laser beam, a galvanomirror device is used.

[0003]

By the way, when the galvanometer mirror device is driven, the position of the actual irradiation point follows the given movement command with a delay due to the inertial force of the driving portion such as a mirror. An inward phenomenon may occur. That is, when marking the trajectory of the character “A” as shown in FIG. 10A, the vertex 1 is set from the lower left end point of “A”.
Even after a certain time has passed after receiving the move command, the irradiation point of the laser beam is at a position halfway toward the vertex 1, and at that position, the point before the vertex 1 (see reference numeral 4 in FIG. 4B). Command is given. Then, under the influence of the movement command, as shown in FIG.
) Goes inward without passing through vertex 1.

[0004] In response to this phenomenon, in the publication described in the above publication, as shown in FIG. 11 (A), the imaginary movement target points 5 and 6 extend on the extension of both line segments connected by the vertex 1 of "A". Provided,
As shown in FIG. 3B, the irradiation point is made to draw a character “8”, and the laser light source is turned off in the extra trajectory above the vertex 1 to mark the acute angle portion of “A”. I have.

However, in such a method, extra marking data is required for each end point of a line segment constituting a character, and there is a problem that a memory for recording the data and an increase in cost are required. On / off of the laser light source is accompanied by extra marking data, and if the tracking delay of the irradiation point fluctuates due to the influence of the temperature or the like, the marking will be shifted.

Further, in addition to the inward rotation phenomenon, the irradiation point may overshoot at the end point of the trajectory due to the inertial force of the mirror or the like. Then, the next operation command is received at a position shifted from the regular end point due to overshoot of the irradiation point, and marking is performed from the shifted position. In order to cope with this, it is conceivable to provide a waiting time at each end point until the overshoot converges. However, if the waiting time is a fixed time, it is necessary to set the waiting time longer than the overshoot time at all the end points of the character to be marked. . Also, if the waiting time is not fixed time but corresponds to each end point, the memory needs to be expanded as described above.

The present invention has been made in view of the above circumstances, and provides a laser marker device capable of marking a workpiece without distorting the text and graphics even when marking the text and graphics at high speed. Aim.

[0008]

To achieve the above object, a laser marker device according to the first aspect of the present invention moves a laser beam irradiation point on a workpiece in accordance with a set character or figure. In a laser marker device for marking characters and graphics on the surface of a work, a laser light source that emits laser light, and generates coordinate data of at least an end point that is a start point and an end point of a linear component from a movement locus of an irradiation point formed of a linear component, Galvano data generating means for identifying and outputting end point coordinate data, storage means for storing a plurality of coordinate data, and receiving the coordinate data one by one, and moving the irradiation point corresponding to the coordinate data received from the current position. A galvanomirror device for moving to a target point,
Based on the driving amount of the galvanomirror device, approach state detecting means for detecting an approach state to the end point of the irradiation point, and sequentially taking out coordinate data from the storage means and identifying whether or not it is coordinate data of the end point When the coordinate data given to the galvanomirror device is the coordinate data of the end point, based on the output signal of the approach state detecting means,
It is characterized in that it is provided with data supply control means for judging whether the irradiation point has reached the end point and outputting the next coordinate data on condition that the arrival has been confirmed.

According to a second aspect of the present invention, in the laser marker device according to the first aspect, the output signal of the approach state detecting means is compared with the coordinate data given to the galvanomirror device to determine the current position and the end point of the irradiation point. A position deviation detecting means for detecting a position deviation; and a speed detecting means for detecting a moving speed of the irradiation point from a change amount of an output signal of the approach state detecting means, wherein the position deviation is within a predetermined range and the moving speed of the irradiation point. It is characterized in that it is confirmed that the irradiation point has reached the position of the movement target point, provided that is equal to or lower than a predetermined speed.

[0010] The invention of claim 3 is claim 1 or claim 2.
In the laser marker device described, a plurality of workpieces are sequentially moved and supplied to the laser marker device,
It is provided with a work moving speed input means for inputting the moving speed of the work, and is characterized in that a correction is made for the moving speed of the work to mark the work surface.

[0011]

<Operation and Effect of the Invention><Invention of claim 1> When the laser marker device of the present invention is started, a plurality of coordinate data corresponding to the set characters / graphics are output from the galvano data generation means and stored in the storage means. You. Then, the data supply control means sequentially retrieves the coordinate data from the storage means and supplies the coordinate data to the galvanomirror device. The galvanomirror device moves the irradiation point to a movement target point corresponding to the received coordinate data, and The locus corresponding to the character / graphic is marked on the work surface by the locus drawn by the point. Here, when the coordinate data given to the galvanomirror device is the coordinate data of an end point constituting a character or a figure, the data supply control means transmits the next coordinate data to the galvanomirror device until the irradiation point reaches the end point. Do not give to.
As a result, even if the tracking of the irradiation point is delayed, marking can be reliably performed up to the end point. In addition, when the irradiation point reaches each end point, the data supply control means immediately supplies the next coordinate data to the galvanomirror device on condition that the irradiation point does not require an extra waiting time at each end point, and quickly. Marking can be performed.

According to a second aspect of the present invention, the data supply control means determines that the irradiation point reaches the end point on the condition that not only the positional deviation between the irradiation point and the movement target point but also the speed of the irradiation point is equal to or lower than a predetermined speed. Therefore, even if the irradiation point overshoots the end point, it can be reliably determined whether the irradiation point has reached the end point.

<Invention of claim 3> Since the marking is performed by adding the correction based on the moving speed of the work, the marking does not shift even when the work is moved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 10 denotes a laser light source, and the direction of the laser light emitted from the laser light source is changed by a galvanomirror device 11. The galvanomirror device 11 includes a pair of galvanomirrors 12.
Can be shifted in the vertical direction by the driving means 13, and the other galvanomirror 12
Can shift the angle in the horizontal direction. As a result, the laser light is turned in two directions by the two galvanomirrors 12, and the irradiation point of the laser light moves two-dimensionally on the workpiece W.

The galvanomirror device has a controller 1
4 are connected to each other.
As shown in the figure, the galvano data generating means 1 according to the present invention
5, a storage unit 16, a data supply control unit 17, a determination unit 200, and an approach state detection unit 100. The determining means 200 includes a first window comparator 29 (hereinafter simply referred to as “first comparator 29”) and a second window comparator 30 (hereinafter simply referred to as “second comparator 30”). The detecting means 100 includes an angle detecting means 18 and a speed detecting means 19. The signal extracted from the storage unit 16 is supplied to the driving unit 13 of the galvanomirror device 11 via the D / A conversion unit 20, and the output signal from the angle detection unit 18 is output via the first comparator 29. The data is supplied to the data supply control means 17 and the speed detection means 19
Are supplied to the data supply control means 17 via the second comparator 30.

Next, the operation of this embodiment will be described by taking as an example the case where the character "AC" is set as a marking target in this laser marker device. When a trigger signal for starting the marking is input from the outside to the laser marker device, the galvano data generating means 15 receiving the trigger signal determines the starting points of a plurality of vector components from the trajectory data as shown in FIG. End point (Fig. 3
A plurality of coordinate data for each point (B) is generated,
These are stored in the storage means 16. At this time, out of the plurality of coordinate data, both end points of the straight line component forming “A” (points denoted by reference signs T1 to T5 in FIG. 3B) and both end points of the straight line component forming “C” ( Symbols K1 to K in FIG.
The coordinate data of the end point consisting of (point 15) is attached with identification information indicating the end point. Here, it is a continuum of the vector components indicated by the arrow in FIG. 3B that constitutes “A”, and the end points of the straight line component among the end points of the vector components are the two ends of the “linear component The endpoints of the other vector components are not the “end points of the linear components” of the present invention. The end points are also provided with irradiation on / off information of the laser light source 10 as a criterion for determining whether or not the laser light source 10 starts irradiation. Further, line type information for identifying whether each coordinate data is related to a point of a type of line, which is a straight line or a curved line constituting “AC”, is included.

Next, on the condition that the coordinate data is stored in the storage means 16, the data supply control means 17 sequentially retrieves the plurality of coordinate data, passes the data through the D / A conversion means 20, and outputs the data to the galvanometer. This is given to the mirror device 11. Specifically, with respect to “A”, the coordinate data of the lower left end point T1 of “A” is first given to the galvanomirror device. The coordinate data of the start point and the end point of the vector component are sequentially extracted and provided to the galvanomirror device 11.

In the galvanomirror device 11, both driving means 1 are controlled based on the voltage signal obtained by D / A conversion of the coordinate data.
3 and 13 are driven, whereby the two galvanometer mirrors 1 are driven.
The slopes of 2, 12 are changed. Then, the irradiation point moves two-dimensionally and moves to a predetermined position on the workpiece W, and this operation is repeated with respect to the sequentially received coordinate data, and the irradiation point draws a locus. At this time, based on the irradiation on / off information of the laser light source 10 attached to the coordinate data, the laser light source is turned on / off while the irradiation point is moving, so that the locus corresponding to “AC” is marked on the work surface. Is done.

When the galvanomirror device 11 is driven, a follow-up delay of the irradiation point occurs due to the inertial force of the galvanomirror 12 and the driving means 13. However, the laser marker device operates as described in detail below to prevent the marking from shifting. That is, when the driving unit 13 of the galvanometer mirror device 11 is driven, the driving unit 1
3 detects the angle and outputs a voltage signal to the first comparator 29. Further, the speed detecting means 19 takes in the output signal of the angle detecting means 18 and outputs a speed voltage signal obtained by differentiating the output signal to the second comparator 30.

The first comparator 29 obtains a voltage difference between the voltage signal as a result of the angle detection and the output signal of the D / A conversion means 20, and compares whether this voltage difference is smaller than a first reference voltage. , A binary signal corresponding to YES / NO is supplied to the data supply control means 17. Here, the first reference voltage is set in advance to a predetermined magnitude. For example, when the irradiation point of the laser beam falls within the reference radius R1 with respect to the movement target point, the voltage difference becomes equal to the first reference voltage. When the voltage becomes lower than the voltage, a signal of YES is given to the data supply control means 17.
Further, the second comparator 30 compares whether or not the voltage signal as a result of the speed detection is smaller than the second reference voltage, and also gives a binary signal corresponding to YES / NO to the data supply control means 17. . Here, the second reference voltage is also set in advance to a predetermined magnitude. For example, when the moving speed of the irradiation point falls below the reference speed V1,
The angle detection voltage signal becomes smaller than the second reference voltage, and a signal of YES is given to the data supply control means 17.
The above-mentioned first and second reference voltages are set to predetermined values based on print quality and print speed.

On the other hand, the data supply control means 17 identifies whether or not the coordinate data given to the galvanomirror device 11 is the coordinate data of the end point. At this time, if the coordinate data given to the galvanomirror device is identified as the coordinate data of the end point, information that the coordinate data of the end point has been given is stored in a predetermined register. As long as one of the signals from the comparators 29 and 30 is not YES, the coordinate data of the end point is repeatedly provided to the galvanomirror device 12 and the comparators 29 and 30 are repeated.
When both of the signals from the above become YES, it is determined that the irradiation point has reached the end point, and the next coordinate data is given to the galvanomirror 12 on the condition thereof.

More specifically, the following describes the end point T1 (see FIG. 3B) at the lower left of "A" among the end points, for example. That is, since the end point T1 is an end point, when the data supply control means 17 gives the coordinate data of the end point T1 to the galvanomirror device 11, information to that effect is stored in the register. While the galvanomirror device 11 is driven and the irradiation point is moving toward the end point T1, the laser beam is turned off, and it is determined that the irradiation point has reached the end point T1. Give laser light ON
Becomes This determination is made based on the output signals of the comparators 29 and 30 when the irradiation point falls within the reference radius R1 from the end point T1 and the moving speed of the irradiation point falls within the reference speed V1. That is, the irradiation point is the end point T
When the irradiation point is outside the reference radius R1 in the process of heading to 1, the signal from the first comparator 29 is YES.
Therefore, the coordinate data of the end point T1 is repeatedly provided to the galvanomirror device 11. Even if the irradiation point enters the reference radius R1, when the moving speed of the irradiation point is equal to or higher than the reference speed V1, the signal from the second comparator 30 is not YES, so the coordinate data of the end point T1 is still repeatedly provided. Can be And the irradiation point is the end point T1.
Are within the reference radius R1 and the moving speed of the irradiation point becomes equal to or lower than the reference speed V1.
The signals from 9 and 30 become “YES”, and the next coordinate data is given to the galvanometer mirror 12. As a result, the irradiation point reliably reaches the end point T1, and marking is performed from the end point toward the next movement target point (the obliquely upper right point in FIG. 3B).

Also, of the end points, for example, the vertex T2 of "A"
(Refer to FIG. 3B) is slightly different from the case of the end point T1. In the following, only the differences will be described. When the irradiation point goes from the end point T1 to the vertex T2 while the laser beam is in the ON state, it is determined only that the irradiation point has entered the reference radius R1 from the vertex T2. Light is off
Can be switched to However, the data supply control means 17
Keeps supplying coordinate data of vertex 2 repeatedly until both conditions that the irradiation point falls within the reference radius R1 from vertex 2 and the moving speed of the irradiation point falls within reference velocity V1 are satisfied. Then, when it is determined that both of the conditions are satisfied and reached, the laser light is switched to the ON state again, and the data supply control means 17 returns to the next coordinate data (the point U2 at the oblique lower right point in FIG. 3B). Coordinate data). As a result, even if the irradiation point passes over the vertex T2 and overshoots, the laser light is turned off at the overshoot portion, so that the marking is not required.

Further, among the end points, for example, the end point T of "A"
3 (see FIG. 3B) operates as follows. That is, when the irradiation point goes to the end point T3 while the laser light is ON, it is determined only that the irradiation point is within the reference radius R1 from the end point T3, the laser light is switched to the OFF state, and data is supplied. The control means 17 supplies the next coordinate data (the coordinate data of the end point T4 in FIG. 3B).

As described above, in the laser marker device of the present embodiment, the next coordinate data is not supplied to the galvanomirror device 11 until the irradiation point reaches the end point. Marking can be performed up to the end point. Moreover, when the irradiation point reaches each end point, the data supply control means 17 immediately supplies the next coordinate data to the galvano mirror device 11 on condition that the irradiation point reaches each end point.
No extra waiting time is required, and marking can be performed quickly. In addition, the data supply control unit 17 determines whether the irradiation point has reached the end point on the condition that not only the positional deviation between the irradiation point and the end point but also the speed of the irradiation point is equal to or lower than a predetermined speed. Even if the irradiation point overshoots, it is possible to reliably determine whether the irradiation point has reached the end point.

<Second Embodiment> Hereinafter, this embodiment will be described with reference to FIG.
A description will be given based on FIG. This laser marker device is shown in FIG. 4, and a head unit 24 including a galvanometer mirror device 11 is connected to the controller unit 14 via respective line drivers 25A and 25B.

The controller section 14 is provided with a console 23 for setting characters and graphics to be marked. The console 23 is provided with a display unit (not shown), where input data can be confirmed. A pair of CPUs 1 and 2 are built in the galvano data generation means 15, and a counter 26 is connected to the data supply control means 17. Further, the galvano mirror 12 is driven by a servo drive unit 27, and the head unit 24 is provided with a servo circuit 28 for driving the servo drive unit 27. The other configuration is the same as that of the first embodiment, and therefore, the same portions are denoted by the same reference numerals and overlapping description will be omitted.

Next, the operation of the laser marker device of this embodiment will be described. First, by the console 23,
For example, a character “AC” to be marked is input. Then, “AC” is displayed as marking information on the display unit provided on the console 23, and it can be confirmed that the character “AC” has been set.

When a trigger signal for starting the marking is input from the console 23, the CPU 1 provided in the galvano data generating means 15 generates coordinate data of a plurality of vector components from the locus data (see FIG. 3). At this time, each coordinate data includes “AC” together with information on the end point described in the first embodiment.
Includes line type information for identifying which of the straight line and the curved line is related to the point of the type of line.

CPU 2 of galvano data generating means 15
Outputs a storage start signal to the data supply control means 17. Then, the storage unit 16 is set to the write mode by the galvano data generation unit 15, and the CPU 2 writes the coordinate data into the storage unit 16. At this time, the coordinate data is sequentially stored in the storage means 16 with an address by the CPU 2. More specifically, the coordinate data is 16-bit digital data, and a predetermined bit (this bit is referred to as a “status bit” in the following description of FIG. 5) is the end point information and the line type information. Used for

When the CPU 2 finishes outputting all the coordinate data to the storage means 16, it outputs a print start signal to the data supply control means 17, and upon receiving this, the data supply control means 17 reads the storage means 16 Switch to mode,
The coordinate data is sequentially extracted from the storage means 16 according to the following procedure, and is output to the line driver 25B of the controller unit 14. The operation procedure of the galvano data generating means 15 will be described later in detail with reference to FIG.

The line driver 25 of the controller 14
The coordinate data output to B is sent to the D / A conversion means 20 via the line driver 25A of the head unit 24,
The signal is converted into a voltage signal and supplied to the servo circuit 28 and the first comparator 29.

The servo circuit 28 drives the servo driving means 27 provided in the galvanomirror device 11 based on the voltage signals sequentially received. Thereby, the galvanometer mirror 1
2 is changed, and the irradiation point moves two-dimensionally and moves to the movement target point on the workpiece W. The angle of the galvanomirror 12 is detected by an angle detecting means 18 connected to the servo driving means 27, and a signal of this detection result and a speed signal obtained by differentiating the detected signal are fed back to the servo circuit 28.

Now, the tracking delay of the irradiation point is processed as described in detail below, and the displacement of the marking is prevented. That is, the first comparator 29 takes in the voltage signal received by the servo circuit 28 from the D / A converter 20 and the feedback signal obtained as a result of driving the servo driver 27 based on the voltage signal. A comparison is made as to whether the voltage difference between the signals is smaller than the first reference voltage, and the comparison result is converted into a binary signal corresponding to YES / NO, and the data supply control means is provided via the line drivers 25A and 25B. 17 is output. Further, the second comparator 30 takes in the above-mentioned speed signal and compares whether or not the speed signal is smaller than the second reference voltage.
O, a binary signal corresponding to the line driver 25A,
The data is output to the data supply control unit 17 via the data supply control unit 25B.

Then, based on these comparison results, the data supply control means 17 operates as follows. this,
This will be described with reference to the flowchart of FIG. That is, in STEP 1 of the flowchart, the data supply control unit 17 first sets the indicator Ad to “0000”. Here, the value of the indicator Ad is stored in the storage unit 1
6 corresponds to the address where each coordinate data is stored.

Next, in STEP 2, the data supply control means 17 retrieves the coordinate data of the address indicated by the indicator Ad from the storage means 16 and
Output to B. This coordinate data is also given to the data supply control means 17 in STEP3.

In STEP 4, the data supply control means 17
Determines whether the status bit of the fetched coordinate data is a status indicating an end point, and if the status bit is not related to the end point, proceeds to the “NO” branch of STEP 5 and increments the indicator Ad. (STEP 6). Then, after confirming that the coordinate data does not relate to the final point, the process returns to STEP2.

If the coordinate data is related to the end point, the process proceeds to the "YES" branch of STEP5, and it is determined whether the galvanomirror 12 has followed based on the signals from the comparators 29 and 30 (step 5). (STEP 9).
If not, the flow returns to STEP 2 to repeat the subsequent steps. If the flow is followed, the flow proceeds to STEP 6 described above.

By repeating the loop passing through STEP 6, the address content indicated by the indicator Ad is updated sequentially, and coordinate data corresponding to the updated content is sequentially extracted. Then, the user finally arrives at the last coordinate data. At STEP7, it is determined that the coordinate data is related to the last point. At STEP8, the laser light source is turned off. In this manner, the laser marker device of the present embodiment can determine whether or not the irradiation point has reached the irradiation point at the end point.

<Third Embodiment> The third embodiment is a modification of the second embodiment. Hereinafter, this is shown in FIG.
A description will be given based on FIG. Note that portions having the same configuration as the second embodiment are denoted by the same reference numerals, and redundant description will be omitted.

The galvanomirror device 11 of the present embodiment comprises:
A plurality of workpieces W are arranged in the middle of a transport line that is transported in one direction with an interval therebetween, and a sensor 31 (corresponding to “work moving speed input means” in the present application) provided in the middle of the transport line includes: The moving speed of the work is detected. The detection result of the sensor 31 is taken into the second comparator 30 as a voltage signal, and a signal corrected for the moving speed of the work is output from the second comparator 30. Note that the sensor 31 only needs to be able to measure the amount of movement of the work per unit time, and includes, for example, a distance sensor and a rotary encoder. The output signal of the sensor 31 is also sent to the galvano data generating means 15 of the controller unit 14, and the coordinate data is corrected for the moving speed of the work.

According to the configuration of this embodiment, even when the work is moving, the amount of movement is corrected, so that accurate marking can be performed as in the case where the work is stationary. In addition, since the detection result is taken in by the sensor 31, the marking does not shift even when the moving speed of the work fluctuates.

<Fourth Embodiment> This embodiment is shown in FIG. 8 and includes a console 23 as a work moving speed input means according to the present invention, and inputs a moving speed of a work from the console 23 as a fixed value. Configuration. More specifically, the calculating means 50 calculates a correction value for the work moving speed based on the set value of the work moving speed input at the console 23, adds the correction value to the coordinate data output from the storage means 16, and adds The set value of the moving speed is taken into the second comparator 30 via the line drivers 25A and 25B, and a signal corrected for the work moving speed is output from the second comparator 30. <Other Embodiments> The present invention is not limited to the embodiments. For example, the embodiments described below are also included in the technical scope of the present invention. Various changes can be made without departing from the scope of the present invention.

(1) In the second to fourth embodiments, the marking information is input from the console 23. However, for example, a personal computer or a sequencer may be connected to the laser marker device, and the marking information may be input thereto. .

(2) The laser light source may be any laser light source such as a gas laser, a liquid laser, a solid-state laser, and a semiconductor laser.

(3) Although the comparators 29 and 30 of the second to fourth embodiments compare analog signals, they may compare digital signals.

(4) Although the galvano data generating means 15 of the second to fourth embodiments is provided with a pair of CPUs, a single CPU may be used. However, if the number of CPUs is two, the speed of the data generation process can be increased.

(5) The work to be marked by the laser marker device may be a non-animal such as a wall or a floor.
In this case, if the controller unit 14 and the head unit 24 are separated as in the second to fourth embodiments, the head unit can be downsized and the head unit itself can be easily moved.
Marking on walls and the like becomes easy.

(6) The data supply control means of each of the above embodiments is configured to repeatedly supply the coordinate data of the irradiation point until the irradiation point reaches the end point. A configuration may be adopted in which the apparatus waits until the vehicle arrives without supplying the coordinate data, and supplies the coordinate data of the next point after the arrival is confirmed.

(7) In the second to fourth embodiments, the judgment means (first and second comparators) are used.
The A / D converter may be used to convert a signal from the angle detector or the speed detector into a digital signal, and the data supply unit may determine based on the digital signal.

(8) In the laser marker device of each of the above-described embodiments, whether or not the irradiation point has reached the end point is determined based on both the position deviation and the speed deviation. It is also possible to adopt a configuration in which the determination is made only by using.
When the determination is made only by the position deviation, the angle detecting means becomes the approach state detecting means according to the present invention, and when the determination is made only by the speed deviation, the speed detecting means becomes the approach state detecting means according to the present invention.

(9) As a modified example of the first embodiment,
The galvano data generation unit 15 may be configured to generate the coordinate data of the start point and the end point of the vector component indicated by the arrow in FIG. 9 and store these in the storage unit 16. In this case, the linear components forming “A” and “C” are the vector components shown in FIG. 9, and the endpoints of the vector components correspond to “the endpoints of the linear components” of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a laser marker device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the laser marker device.

FIG. 3A is a schematic diagram showing a state in which a set character is decomposed into a plurality of vector components. FIG. 3B is a schematic diagram showing points at both ends of the vector components.

FIG. 4 is a block diagram of a laser marker device according to a second embodiment.

FIG. 5 is a flowchart showing an operation procedure of a data supply control unit.

FIG. 6 is a schematic perspective view of a laser marker device according to a third embodiment.

FIG. 7 is a block diagram of the laser marker device.

FIG. 8 is a block diagram of a laser marker device according to a fourth embodiment.

FIG. 9 is a schematic diagram of a trajectory showing a modification of the first embodiment.

FIG. 10 is a schematic view of marking data and a trajectory showing a conventional problem.

FIG. 11 is a schematic diagram of marking data and a trajectory showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Laser light source 11 Galvano mirror device 15 Galvano data generation means 16 Storage means 17 Data supply control means 18 Angle detection means 19 Speed detection means 29 1st comparator (position deviation detection means) 30 2nd comparator 31 Sensor (Work moving speed input means) ) 32 Console

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kimio Kondo 3-5-3, Akebonocho, Tachikawa-shi, Tokyo Inside Sunkus Co., Ltd. (72) Inventor Iku Akasaka 3-53-3, Akebonocho, Tachikawa-shi, Tokyo (56) References JP-A-9-285882 (JP, A) JP-A-8-323486 (JP, A) JP-A-7-290257 (JP, A) JP-A-11-28588 (JP, A) A) JP-A-4-127980 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23K 26/00 B23K 26/06

Claims (3)

(57) [Claims] 1. A laser marker device for marking a character or figure on the surface of a work by moving an irradiation point of a laser beam on the work in accordance with a set character or figure. Galvano data generating means for generating at least coordinate data of an end point which is a start point and an end point of the linear component from a movement locus of the irradiation point formed of a linear component, and outputting the coordinate data of the end point in an identifiable manner; Storage means for storing the plurality of coordinate data; a galvanomirror device for receiving the coordinate data one by one and moving the irradiation point from a current position to a movement target point corresponding to the received coordinate data; Approach state detecting means for detecting an approach state to an end point of the irradiation point based on a driving amount of the device; The coordinate data is sequentially taken out from the column, and whether or not it is the coordinate data of the end point is identified and given to the galvanomirror device. When the given coordinate data is the coordinate data of the end point, the approach state Data supply control means for judging whether the irradiation point has reached the end point based on an output signal of the detection means and outputting the next coordinate data on condition that the arrival is confirmed. Laser marker device. 2. An output signal of the approach state detecting means is compared with coordinate data given to the galvanomirror device.
Position deviation detecting means for detecting a positional deviation between a current position and an end point of the irradiation point, and speed detecting means for detecting a moving speed of the irradiation point from a change amount of an output signal of the approach state detecting means, 2. A method according to claim 1, further comprising: checking whether the irradiation point has reached the position of the movement target point, provided that a positional deviation falls within a predetermined range and a moving speed of the irradiation point is equal to or lower than a predetermined speed. The laser marker device according to claim 1. 3. A plurality of works are sequentially moved and supplied to the laser marker device, and a work moving speed input means for inputting a moving speed of the work is provided, and a correction corresponding to the moving speed of the work is added. The laser marker device according to claim 1, wherein marking is performed on the surface of the work by using the laser marker.